combo box in netbeans?

Hi,

when we place a combo box, we know that we have to click it to see values and choose one of them, but i want in such a way that, in combo box field user will type and the combo box should dynamically populat data. i.e. there is no mouse click by user, he will just type only half the string what he has to search and the other half combo box has to show. how can we do this in netbeans?